<?php
/**
 * Smarty plugin
 *
 * @package    Smarty
 * @subpackage PluginsModifierCompiler
 */

/**
 * @ignore
 */
require_once(SMARTY_PLUGINS_DIR . 'shared.literal_compiler_param.php');

/**
 * Smarty escape modifier plugin
 *
 * Type:     modifier<br>
 * Name:     escape<br>
 * Purpose:  escape string for output
 *
 * @link   http://www.smarty.net/docsv2/en/language.modifier.escape count_characters (Smarty online manual)
 * @author Rodney Rehm
 *
 * @param array $params parameters
 *
 * @return string with compiled code
 */
function smarty_modifiercompiler_escape($params, $compiler) {
	static $_double_encode = null;
	if ($_double_encode === null)
	{
		$_double_encode = version_compare(PHP_VERSION, '5.2.3', '>=');
	}

	try
	{
		$esc_type = smarty_literal_compiler_param($params, 1, 'html');
		$char_set = smarty_literal_compiler_param($params, 2, Smarty::$_CHARSET);
		$double_encode = smarty_literal_compiler_param($params, 3, true);

		if (!$char_set)
		{
			$char_set = Smarty::$_CHARSET;
		}

		switch ($esc_type)
		{
			case 'html':
				if ($_double_encode)
				{
					return 'htmlspecialchars(' . $params[0] . ', ENT_QUOTES, ' . var_export($char_set, true) . ', ' . var_export($double_encode, true) . ')';
				}
				else if ($double_encode)
				{
					return 'htmlspecialchars(' . $params[0] . ', ENT_QUOTES, ' . var_export($char_set, true) . ')';
				}
				else
				{
					// fall back to modifier.escape.php
				}

			case 'htmlall':
				if (Smarty::$_MBSTRING)
				{
					if ($_double_encode)
					{
						// php >=5.2.3 - go native
						return 'mb_convert_encoding(htmlspecialchars(' . $params[0] . ', ENT_QUOTES, ' . var_export($char_set, true) . ', ' . var_export($double_encode, true) . '), "HTML-ENTITIES", ' . var_export($char_set, true) . ')';
					}
					else if ($double_encode)
					{
						// php <5.2.3 - only handle double encoding
						return 'mb_convert_encoding(htmlspecialchars(' . $params[0] . ', ENT_QUOTES, ' . var_export($char_set, true) . '), "HTML-ENTITIES", ' . var_export($char_set, true) . ')';
					}
					else
					{
						// fall back to modifier.escape.php
					}
				}

				// no MBString fallback
				if ($_double_encode)
				{
					// php >=5.2.3 - go native
					return 'htmlentities(' . $params[0] . ', ENT_QUOTES, ' . var_export($char_set, true) . ', ' . var_export($double_encode, true) . ')';
				}
				else if ($double_encode)
				{
					// php <5.2.3 - only handle double encoding
					return 'htmlentities(' . $params[0] . ', ENT_QUOTES, ' . var_export($char_set, true) . ')';
				}
				else
				{
					// fall back to modifier.escape.php
				}

			case 'url':
				return 'rawurlencode(' . $params[0] . ')';

			case 'urlpathinfo':
				return 'str_replace("%2F", "/", rawurlencode(' . $params[0] . '))';

			case 'quotes':
				// escape unescaped single quotes
				return 'preg_replace("%(?<!\\\\\\\\)\'%", "\\\'",' . $params[0] . ')';

			case 'javascript':
				// escape quotes and backslashes, newlines, etc.
				return 'strtr(' . $params[0] . ', array("\\\\" => "\\\\\\\\", "\'" => "\\\\\'", "\"" => "\\\\\"", "\\r" => "\\\\r", "\\n" => "\\\n", "</" => "<\/" ))';

		}
	} catch (SmartyException $e)
	{
		// pass through to regular plugin fallback
	}

	// could not optimize |escape call, so fallback to regular plugin
	if ($compiler->tag_nocache | $compiler->nocache)
	{
		$compiler->template->required_plugins['nocache']['escape']['modifier']['file'] = SMARTY_PLUGINS_DIR . 'modifier.escape.php';
		$compiler->template->required_plugins['nocache']['escape']['modifier']['function'] = 'smarty_modifier_escape';
	}
	else
	{
		$compiler->template->required_plugins['compiled']['escape']['modifier']['file'] = SMARTY_PLUGINS_DIR . 'modifier.escape.php';
		$compiler->template->required_plugins['compiled']['escape']['modifier']['function'] = 'smarty_modifier_escape';
	}

	return 'smarty_modifier_escape(' . join(', ', $params) . ')';
}

?>
